Centrifugal pump structure



Nov. 17, 1936. A. c. SAXE 2,051,521

CENTRIFUGAL PUMP STRUCTURE Filed Feb; 27, 1935 F. III!!! mulling;

' III 7 ATTORNEYS.

Patented Nov. 17, 1936 I, I. I

UNITED. STATES PATENT OFFICE moi sifi s'raucrnnn v V Arthur 0. Bare, olumbus,0hio, assiguor to The Jaeger Machine Company, Columbus, Ohio, a corporation of Ohio Application February 27, 1933, Serial No. 658,685 8 Claims. (0!. 103-113);

My invention relates to centrifugal pump strucpartment and connected at one end to the interior ture. It has to do, more particularly, withcenof the impeller chamber substantially along the triiugm pumps which are designed to be -used in axis thereoi' and connected at its other end to the the removal of water from an excavation, alsuction line which may be disposed in the excavathough it is not necessarily limited thereto. tion from which the liquid-is to be pumped. 5

One of the objects of my invention is to provide The suction chamber of my pump structure is a centrifugal pump which will be self-priming provided with a passageway leading from the under practically all conditions of operation. priming liquid-compartment into the interior of Another object of my invention is to provide such suction chamber. Operating in conjunction 10 a self-priming centrifugal pump provided with with this passageway, there is provided a-con- 10 a receptacle for priming fluid that will be of am trolling valve in the form Ofl a plate which, when ple capacity and so disposed with relation to the open, partially projects into the path of the liquid various parts of the pump as to form a compact issuing from the delivery orifice of the impeller structure that may be economically manufacchamber and maintains this position'as long as 5 t r d, I the velocity head of the liquid being drawn Another object of my invention is to provide through the suction line and delivered through mechanism for controlling the self-priming Opersuch impeller casing orifice is'below a' selected ation which may be economically produced and rate. This plate Va is t a y movab e tO- which will operate with certainty and dispatch wards closed position by the occurrence of the in response to existing conditions in the suction p ope v y h d an is fi ally movable-into 20 line of the pump. position to substantially close the priming fluid Another object of my invention is to provide a p a eway by the hydrostatic action of the centrifugal pump having a compartment for water within the priming liquid compartment priming liquid together with a simple'and eflec plus the suction within the suction chamber of tive means for preventing clogging of such comthe pump. v 25 partment by mud or silt or other extraneous The P ed embfldiment 0! my nv tio is solid matter such as is liable to pass through a h wn in the a pa y drawing wherein pump designed for the service indicated. similar characters of reference des ate corre- Another object of my invention isto provide Sponding pa t and wherein! afself-priming centrifugal pump which has all Fi ure 1 is a perspective view partially broken of the parts thereof readily accessible for inspecay, 1' my centrifugal pump structure. tion or repair and on which the up-keep will be Figure 2 is a vertical. transverse section or the reduced to a minimum. structure shown in Figure 1.

In its preferred form, myinvention preferably Figure 3 is a section taken on line 1-4 of contemplates the provision of an impeller cham- Figure 2. 35

her of volute form which is eccentricaliy dis- Figure 4 flep p flve View O y cen ri u a posed within a larger and substantially cylindrical Pu p St u ture assembled. compartment that is adapted to contain priming In the drawing. t e exterior asing of my h p liquid in suiflcient volume that the pump will is Shown at This exterior 086 8 P ded 40 always be ready for operation without special on one side, adjacent the top thereof, with an 40 priming after any temporary stoppage to which intake port 2 under the control of a check valve it is likely to besubjected. The impeller of my I and designed for connection to a suction line 4 pump is preferably of circular form with blades that may, if desired, be provided at its lower end spaced suillciently far apart to facilitate the paswith a sand strainer 4a. The casing I is further sage therethrough of the material which the provided with a discharge port-5 disposed in the 45 pump is designed to handle. top of such casing.

In its preferred form, my centrifugal pump By reference to the drawing, it will be, seen structure is provided with a discharge opening that the impeller chamber, which I utilize and for delivering the fluid from the volute impeller which isdesignated 8, is eccentrically disposed casing into the priming fluid compartment at within the casing I. It is of volute form and its 50 the base thereof, and it is also provided with a outer wall is formed by the side wall of the cas-- discharge opening from the priming fluid coming i. It is of considerably less width than this partment for the discharge of the liquid therecasing and is located more closely adjacent to i from. It is further provided with a suction chamthe base than to the top of the casing. 5' her mainly disposed within the priming fluid co n- This impeller. chamber is provided with a dis- -may tend to clog this compartment.

disposed within the casing. I. It is further provided with a jet opening 8 in its inner side wall for the discharge of liquid therethrough.- Both the discharge 'outlet 1 andthejet opening 8, being disposed at the base of the priming liquid compartment, will normally operate to undercutand-stir .up any mud or silt'or debris that has settled in the priming liquidcompartment or that Disposed within the volute impeller chamber is a circular impeller 3 having a plurality of widely spaced blades ID. This impeller is adapted to be rotated within the impeller chamber through the medium of a shaft II by means of a motor I! which may be of any desired type.

The peripheral wall of the impeller chamber is continued, in a direction opposite to the direction of rotation of the impeller, past the dis' charge outlet 1 to form'a blade-6 which extends inwardly a considerable distance from the discharge outlet. This blade-6' is provided for a purpose which will be hereinafter fully explained.

The blade 5 is so disposed that the outer ends of the blades of the impeller will just barely pass such blade without interference therewith. It is impfirtant, as will be later understood, 'for the outer ends of the impeller blades to pass very close to the inner surface of the outer extremity of the blade 6' when the impeller rotates. Therefore, the outer end or the blade 6' is provided with a raised flat portion 6a. This fiat portion'is first made fairly high and is machined down to such an extent that it. will lie very close to the outer ends 01 the impeller blades when they move past it. The outer surface of theouter end of each ,of'the impeller blades illis substantially flat so that it will cooperate with the flatraised portion 6a of the blade 6' and will pass very closeto' such portion. In case a smaller impeller were used, the blade 6' would-be disposed closer to wards the center of the impeller chamberin order that itwould lie close 01 the impeller.

The priming liquidcompartment maybe gen.-

erally designated IS. A portion of it is disposed above the impeller chamber and a portion ofit is disposed along one side thereof, as at ll. It

is at all times in communication with the-discharge pipe through thedischarge'outlet 5 of the casing. When the pump is fully eifective, most oi the water passes from the discharge outlet l 01' I blaclrarrows of Figure 3. A portion of the" water,

the impeller chamber upwardly along the wall I5 the priming fluid compartment and thence, out

through the outlet 5, as illustrated by the heavy however, passes" by the outlet in the direction indicated by the light arrows and-is circulated 'within'the priming liquid compartment to prevent settling of the mud and slit-and assist in preventing clogging'of the pump.

While this circulation is desirable, it-should not be tooviolent. Otherwise, the violently circul'ated watermay tend to entrain air and gas during-the priming period and, by conducting it into the priming'fluid passageway, defeat or tend to defeat the priming action; q Too violent a circulation or the liquid within the priming liquid compartment is prevented by .th'e torm'and location of the suction chamber l8 which, in addition to its-other functions, serves as an obstruction or baiile across that portion of the priming liquid compartment which is disposted at. oneside'of the-impeller chamber and to the outer portion.

which, therefore, slows up the circulation of the water in the priming liquid compartment.

' This suction chamber l6 communicates at its upper end with the intake port 2 and is provided adjacent its base with an outlet H which is of circular form and leads substantially axially into the-impeller chamber. As illustrated in Figure 3,

the suction chamber is substantially of rectangular form and is provided in its base with a priming liquid passageway lLthrough which priming liquid may pass from the priming liquid compartment into the suction chamber and thence into the impeller chamber.

Under certain conditions, i may so construct my pump that'the suction chamber l5 isextended to a higher level. Thus, the height of this suction chamber may be made 'sufilciently reat to enable me to dispense/with the provi- 'sion of a check valve in the suction line and, at the same time, insure that the liquid irom' the priming liquid compartment will never be siphoned out of the suction chamber and into the suction line.

The priming liquid passageway l8 may be formed within a sleeve 19 projecting through the base ofthe suction chamber and it preferably leads 1 into an elbow pipe 20 which directs thepriming liquid towards the opening I! and into the impeller chamber, therebyguiding it away from the intake port 2.

'Themeans for controlling the priming fluid passageway i8 takes the form of a plate 2! which is hingedly-secured to the base of the suction chamber by means of a, rubber hinge 22. When this, plate is in lowered position, as shown in full lines in F'lgure 3, the passageway I8 is open to permit free flow of the primingliquid 'from the priming liquid compartment into and through the elbow pipe 2|] and thence to the suction chamher and'interior of the impeller casing. When this plate is in raised'position, as shown in dotted lines in Figure 3, it covers the. passageway i8 and substantially stops the flow of priming liquid therethrough, although a relatively smallaperture 23 through the plate 2laligns with the passageway I! so that the hydrostatic force of the'water which holds the'valveclosed .is neutralized somewhatto facilitate automatic opening of the, valve when pump operating conditions- -necess itate priming.

As shown in Figure 2, the plate 2i is provided with a laterally projecting toe 24 which projects partially acrossthe discharge outlet 1 of the impellerchamber when theplate 2| is in lowered position but which is substantially ,out of the path -of direct flow of the water from the outlet 1 of the impeller chamber to the outlet 5 of 'the casing when the plate is in position to substantially close this priming water passageway l8.

The'platej 2| is further provided adjacentits end'with a weight 2-5 which is preselected with relation to the velocity head considered desirable as a condition precedent to the discontinuance of the priming action. 'This weight serves the duaiiunction oi predeterminin'g this'velocity head at which priming shall cease and insuring the automatic opening of the valve when prim-- ing is necessary.

- -In the operation of this plate valve, "starting with the plate in the fullline position shown in Figure 3, the starting of rotation ofthe impeller it will draw priming liquid through the passage way l8 and thence into the impellenchamber' and through the. discharge outlet 1 of the im-- peller chamber back into the priming liquid compartment and-again through the passageway II. This circulation of the priming liquid will continue and the plate valve will remain immovable in open position as long as there is an undesirable proportion of air mixed with the chamber, the closing movement of the valve fl is initiated by the pressure of the liquid against the toe 24* of the valve plate. This results in a rapid upward swinging of this plate to a posiliquid in the priming liquid compartment and the suction eflected through the passageway ll become effective to complete the closing of the valve and the substantial discontinuance of sup-l ply of the priming liquid through such passageway to the impeller. Whenever the p mp is stopped or whenever the velocity head of theliquid fiowingtherethroughdrops below the predetermined minimum, the plate 2l will swing downwardly to completely uncover the passageway l8, so that the priming liquid will .be free v to pass ,theretlirough for priming.

When the plate ii is in closed position, it will be noted that the hydrostatic force of the water in the priming compartment will be exerted over the entire lower surface of the plate. This force will also be exerted over the entire upper lower surface of this plate with the exception of the very small area directly below the passageway i8. Thus, when the plate 2i is in closed position, as indicated by the dotted lines in Figure 3, it will be substantially hydrostatically balanced but will be slightly out of balance due to the fact that the hydrostatic pressure does not act on the'small area of the upper surface of the plate which is directly below passageway i8. Thus, there is a slight hydrostatic unbalance which tends to keep the plate 2| in closed position. This force is aided by the suction force which also tends to keep the platein position.

However, the weight 25 is suflicient to overcome this slight unbalanced condition just as soon as vacuum is broken and the velocity head of the water discharged from the impeller chamber drops below a predetermined degree.

when the priming stage is completed, the continued operation of the. pump results in drawing the liquid from the excavation through the suction line 4 and inlet 2 past the check valve into the suction chamber It. tion chamber, it passes through the opening ll into the impeller chamber and is discharged therefrom mainly through the discharge orifice 1. The major portion of the water so discharged passes directly to and through the'discharge outlet 5, as indicated by the heavy black arrows, and thence, through provided discharge pipes to any selected point. A portion of the liquid discharged from the discharge orifice I, 'of the impeller casing passes on beyond the outlet ,5 as indicatedby the'light black arrows and circulates over and around the impeller chamber to assist in preventing settling of mud and silt or other debris within the priming liquid compartment. The location of the discharge orifice I of the impeller chamber atthe base of the priming liquid compartment causes the liquid discharged from such orifice to undercut and stir From this sucup any mud, silt or other debris that may have settled ortendedtosettleinthebaseofsuch action will be more efiiciently and quickly carrie'd -out. When the impeller rotates-it throws water outwardly therefrom, due to centrifugal force, and this water will tend to drag air along 1 therewith which will accumulate in and around the impeller. tion at which the. hydrostatic pressure of the If it were not for the blade 8' this air would be carried around with the impeller again and would thereby cut down theefiiciency However-,beoause of the blade 0', the air being carried around by the impeller will be stripped therefrom by the blade 6' and will be caused to pass with the water out'through the discharge outlet 1 of the impeller. chamber. Since the outer ends of the'blades of the impeller be very close to the raised portion 6a of the blade 6' when they pass it, there will be very little air that will pass this point and will be carried back into the impeller chamber. Thus, the priming operation can be much more quickly and effectively carried out. 7

It will be seen from this that I have provided a centrifugal pump structure embodying a pump per se and a self-priming apparatus'of extremely simple construction which can he obviously manufactured for a minimum of cost. It will alsobe apparent that the self-priming apparatus of my invention will permit of a continuous and uninterrupted feed of priming liquid to the pump impeller until the predetermined proper velocity head of liquid is passing through the pump, at

which time, the supply of priming fluid to the chamber is guided by the elbow Ill away from the check valve 3 anddirectly into the impeller chamber, so that danger of the priming liquid passing accidentally back into the suctionline is precluded.- Moreover, the spray of liquid thus directed towards the opening into the impeller chamber entrains air and assists in exhausting the air from the suction chamber and the suction line. a

Itwill be noted also that my apparatus permits of the maintenance of a maximum volume of priming liquid ready for supply to the pump by the use of a priming liquid compartment of such form that it will occupy a minimum space with a consequent reduction of the bulk of the structure see whole. Furthermore, the manner in which I have utilized the liquid being discharged from amount of liquid which must be maintained in the priming liquid compartment to effect priming. In 'the second place, it obviates danger of air being sucked into the suction chamber by a vortex of'water such as tendsto occur with a priming liquid passageway disposed in the upper portion of a suction chamber.

Various other features of advantage will appear from the preceding description and the claims I being of volute form and being cccentrically dis-' posed in said compartment, said chamber being of sucha shape and size and being so positioned in said compartment that there is a substantial space beside and above it in saidcompartment, a

discharge outlet from said chamber located at the base of said compartment so that liquid discharged therefrom will undercut any sand or slit which deposits in the bottom of said compartinent, the outlet from said chamber being so disposed relativeto said outlet from said compartmentthat the major portion of the fluid discharged from said chamber will pass directly t-a and through said compartment outlet while a portion of the fluid will be first circulated within the space beside and above said chamber, a suction chamber disposed in said space at the side of said impeller chamber and extending fromitne top of said compartment to a point spaced above the bottom thereof, an opening in the wall which separates said impeller chamber from the suction chamber, a port for permitting flow of fluid from said compartment into said suction chamber, said port being located below the horizontal center.

plane of said suction chamber, 'an elbow member disposed over said port and adapted to direct fluid through said opening, priming fluid being adapted to flow from said compartment through said port 'into said suction chamber and then into sald impeller. chamber, means for closing said port to shut-oil flow of fluid therethrough when the pump can operate without priming fluid, said means comprising a hinged ,plate which initially extends down into the space below said suction chamber and which has an extension projecting across the discharge outlet from said impeller chamber.

2. AseIf-priming centrifugal pump comprising a substantially, drum-shaped outercasing adapted to form a compartment for priming fluid, said compartment having an outlet, an impeller chamber disposed within said compartment and at one-slde thereof, said chamber beingof such a shape and size and being so positioned in said compartment that there ,is a substantial space left at the side of it in k d compartment, '9. discharge outlet from chamber located at the base of said'compartment so that liquid discharged therefrom will undercut any sand or silt which deposits in the bottom of said compartment; the outlet from said chamber being so disposed relative to the-outlet from said compart;

I ment that the major portion of the fluid discharged from said chamber will pass directly to and through said compartment outlet while .a portion of the fluid will be first circulated within the spacebeside said chambena suction chamber. disposed in said space and adapted to partially obstruct circulation of fluid through said space in said compartment, the lower end of said suction chamber being spaced from the bottom of said compartment, 'an opening permitting flow of fluid from said suction chamber into said impeller chamber, a port for permitting flow offluid from said compartment into said suction chamber, said port being located below the horizontal center plane of said suction chamber, means for closing said port to shut ofl' flow of fluid therethrough when the pump can operate without priming fluid, said means comprising a swinging plate which initially extends down into the space below said suctionchamber and which has an extension projecting into the path of fluid discharged from said impeller chamber.

3. A self-priming centrifugal pump comprising a priming fluid compartment having an outlet leading therefrom, an impeller chamber disposed within said compartment, said chamber being of such a shape and size and being so posi- 'tioned in said compartment that there is a substantial space left beside said chamber in said compartment, a discharge outlet from said chamber located at the base of said compartment so that liquid discharged from said impeller chamber will undercut any sand or silt which deposits in the bottom of said compartment, the outlet from said chamber being so disposed relative to 'the outlet from said compartment that the major portion of the fluid discharged from said I chamber willpass directly to and through said compartment outlet while a portion of the fluid will be flrst'circulated within the space beside said chamber, a' suction chamber disposed in said space and adapted to partially obstruct cir-' culation of fluid through said space. the lower end of -said suction chamber being spaced from the bottom of said compartment, an opening permitting flow of fluid from said suctionchamber into said impeller chamber, a port for permitting flow of fluid from said compartment into said suction chamber, means for closing said port to shut of! flow of fluid therethrough when the pump can operate without priming fluid, said itially extends down into the space belowv said suction chamber and which has an extension thereon which projects into the path of fluid -which' is discharged from saidimpeller chamber.

. 4. A self-priming centrifugal pump comprismeans comprising a swinging plate which ining a priming fluid compartment, an impeller chamber disposed within such compartment, 8.

the base of said compartment so that liquid discharged from said impeller chamber will underdischarge outlet from said chamber located at cutgany sand or silt whichdeposits in the'bottom f said compartment, a suction line leading axialy from said impeller chamber and having a'poi'tion thereof disposed within said compartmerit, a port in said portion of said suction line for permitting flow of priming fluid'from said compartment into said suction line, said port being located below the horizontal center plane of said portion of said suction line, means for automatically closing said port to shut oil? flow of fluid therethrough when the pump can operate without the aid of priming fluid. said means comprising a swinging. plate which is adapted to be forced towards closing position by the fluid flowing through the pump, said plate having an extension which proiect's into the path of. fluid which is discharged from said impeller chamber.

'fromsaid impeller'chamberand having a portion therof disposed within said compartment, a port in said portion of -said suction line for permitting flow of priming fluid from said compartment into said suction line, said port being located below the horizontal center-plane of said portion of said suction line, means for automatically closing said port to shut off flow of fluid therethrough when the pump can operate without the aid of priming fluid, said means comprising a swinging plate which is adapted to be forced towards closing position by the fluid flowing through the pump, said plate havinga portion which projects into the path of fluid which is discharged from said impeller chamber.

6. 'A self-priming centrifugal pump structure comprising an impeller chamber, an impeller ro-- tatably mounted therein, a container for priming liquid enclosing said impeller chamber, a

discharge passage leading from the impeller chamber into the priming container, a suction chamber disposed within said priming container and leading into said impeller chamber and adapted to be connected to a suction line, a priming port leading from said priming liquid container into said suction chamber, said priming port being restricted sothat a quantity of liquid, less than the capacity of the pump, will be permitted to flow therethrough, a valve for controlling said port and adapted-to admiupriming liquid into said impeller chamber when open and to substantially exclude priming liquid therefrom when closed, said valve which controls said priming port comprising a hinged plate movable to a position where it substantially covers said priming port or to apposition where it completely uncovers said port and being movable towards closed position by the velocity head of liquid discharged from said impeller chamber, said hinged plate projecting into the path of flow of liquid dischargedfrom said impeller chamber during the" priming action but being movable substantially out of the path of flow by the action thereon of said velocity head when the priming action I is completed, and a weightof preselected resistthis slight hydrostatic unbalance as soon as ing power associated with said hinged plate to prevent initiation of the movement thereof into the position where it covers said priming port until substantially all the air has been exhausted from the suction line and until the liquid discharged by said impeller has a selected velocity head, so that the priming action will be continuous until completed, said hinged plate being so arranged that the hydrostatic pressure of the liquid in the priming compartment will be exerted over the entire lower surface thereof and over the entire upper surface thereof with the exception of that portion which covers the primingport so that there will be a slight hydrostatic unbalance which tends to aid in maintaining the plate in covering relation to said port, the vacuum force developed by the impeller alsoaiding in keeping said plate in covering relation to the port, said weight being sufficient to overcome vacuum is broken and the velocity head of liquid discharged by the impeller drops below the selected amount so that the hinged plate-will al ing liquid associated with said impeller chamber, a-

discharge passage leading from the impeller chamber into the priming container, a suction chamber leading into'said impeller chamber and adapted to be connected to a suction line, a priming port leading from said priming liquid container intov I said suction chamber, said priming'port being restricted so that a quantity of liqui'd'less than the capacity of the pumpwill be permitted to flow therethrough, a valve for controlling said port and adapted to admit priming liquid into said impeller chamber when open and to substantially exclude priming liquid therefrom when closed, said valve which controls said priming port comprising a hinged plate movable to a position where it substantially covers said priming port orto a position where it uncovers said port and being movable towards closed position by the velocity head of liquid discharged from said. impeller chamber, and a weight of preselected resisting power associated with said hinged plate to prevent initiation of the movement thereof into the position where it covers said priming port until substantially all the air has been exhausted from the suction line and until the liquid discharged by said impeller has a selected velocity head, so that the priming actionwill be continuous until completed, said ,hin'ged plate being so arranged that thehydrostatic pressure of the liquid in the priming compartment will be exerted over the entire lower surface thereof and over the entire upper surface thereof with the exception of that portion which covers the priming port so that there will be a hydrostatic unbalancewhich tends to aid in maintaining the plate in covering relation to said rotatably mounted therein, a container for prim ing liquid associated with said impeller'chamber, a

suction line leading into said impeller chamber, a priming port leading from'said priming liquid container for-permitting passage of liquid into said impeller chamber," a discharge passage leading from the impeller chamber into the priming container, said priming port being restricted so that a quantity of liquid less than the capacity of the pump will be permitted to flow therethrough, a valve-for controlling said port andadapted to admit priming liquid into said impeller chamber when open and to substantially exclude priming liquid therefrom when closed, said valve which control's said priming port comprising a hinged plate movable to a position where it substantially coverssaid priming port or to a position where it uncovers said port and being movable towards closed position by the velocity head of liquid discharged from' said impeller chamber, and means of preselected resisting power associated with said hinged plate to prevent initiation of the movement thereof into the position where it covers said prim ing'port' until substantially all the air has been exhausted from the suction line and until the liquid be. a hydrostatic unbalance which tends to aid in maintaining the plate in covering relation to said port, the vacuum force developed by the impeller alsoaiding in keepingsaid plate in covering relation to the port, said means of preselected resisting power being sumcient to overcome this hydrostatic unbalance and uncover said port as soon' as vacuum is broken and the velocity head of liquid dis charged by the impeller drops below the selected amount.

ARTHUR c. BAKE.

CERTIFlC-ATE OF CORRECTION.

Patent No. 2,061,521.

Npvember 17. 1956.

.AHTHUB c. 'SAXE.

It is hereby certified that error appears) in the printed specification of the above numbered patent requiring correction as follows:

column, line 35, strike out the word "lower"; and that the said Letters Paton Page 3, first should 'be read with this correction therein that the same may conform to record of the case in the Patent Office. v

Signed and Sealed this 26th clever:- January A. D. 1937 (seal) the Henry Van, Arsdale Acting Commissioner of' Patene;

be. a hydrostatic unbalance which tends to aid in maintaining the plate in covering relation to said port, the vacuum force developed by the impeller alsoaiding in keepingsaid plate in covering relation to the port, said means of preselected resisting power being sumcient to overcome this hydrostatic unbalance and uncover said port as soon' as vacuum is broken and the velocity head of liquid dis charged by the impeller drops below the selected amount.

ARTHUR c. BAKE.

CERTIFlC-ATE OF CORRECTION.

Patent No. 2,061,521.

Npvember 17. 1956.

.AHTHUB c. 'SAXE.

It is hereby certified that error appears) in the printed specification of the above numbered patent requiring correction as follows:

column, line 35, strike out the word "lower"; and that the said Letters Paton Page 3, first should 'be read with this correction therein that the same may conform to record of the case in the Patent Office. v

Signed and Sealed this 26th clever:- January A. D. 1937 (seal) the Henry Van, Arsdale Acting Commissioner of' Patene; 

